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n. E. MuLFonn. Clock Striking Attachment.

3 She'etv-Sheet 1.

No, 77,080. Patented April 2i, i868.

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N. E. MuLFonD. Clock Striking Attachment.

3 Sheets-#Sheet 2.

No. 77,080. Patented April 2l, 1868.

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' yClock Striking Attachment.

Patented April v.21; 1888 No. 77,080.v

N. n. MULFO'RD, 0F MADISON, NEWJERSEY.

Letters Patent 1m 77,080, dated Apta 21, 186e.

IMPROVEMENT IMSTRIKINeeA'ITAcIIMENTs-Io CLOCKS.

ilgevclgehnlc numb tu iu tlgeseflettehrs @aient-mn making mit' nf tlge time.

-r'o ALI. WIoM I'I MAY ormonale;l f

'Be it known that 1 N. E. MULFORD, of Madsom'in the county of Morris, and State of New Jersey, have invented a new and improved Striking-Attachment to Clocks .and I do hereby declare that the following is a full,` lear, and exact' description thereof, whichwill'euableothers slilled'in. the art to make and use the same,- refercnce being had to the accompanying drawingsform'ing-part ofv this specification, in which- Figure-1 represents-a. front'elevation, partly in section, of my invention.' y

Figure 2 is 'a' vertical transverse 'secti of" the same, theplane ofsection being indicated .by the line a;

"ligure 3 is a longitininal vertical section of the t.samepthe plane of `section .being indicated by the line y 3,1, fig. 2.

-Smilarletters of reference indcatecorresponding parts. I

This invention relates to a new arrangement for operating the Astriking-partei' a clock, and consists chiefly inthe arrangement of a heart-shaped cam, mounted onthe spi-ndlejof-V th'e vhour-wheel, and in the' arrangement of 'seven pins on the face of the hammer-wheel, said pins beirg arrangedfna'spral line around the centre of the hamnier-wheel.A A;l e ver, hinged atlits opposite end; restingupon the heart-shaped cam, reaches with its free end towards the hammer-wheel, and as its end is being gradually raised or `lowered by the rotation of the cam, itslen'd isbrought against the aforesaid-pins, when the' striking-part is set in motion to arrest the wheel,

aftera certainnumber of'strokes have beonmade.AV As all thepins stand indifferent planes on the wheel, or,

rather, at dlerent distances irom the centre fV the same, and as VAthe end of thelever is brought into a'diierent plane during'the motion 'of the cam in onefhonnthe correct adjustment of the pins is all that is required to make thedevice operate' `in the desredrnanner.

As the cam is mounted firmly on the 'same tube on which the'hour-,hand is fastened, it Awill be an impossibility fertile work to be .deranged if the. shape of the 'cam and the positions of the pins are correct, and'it the hands are not turned back.. i, Y 'i The invention also consists-in the arrangement of a half-hour striking-apparatus, which lisset by the rod to which the regular striking-hammer is attached.

The invention further consists in the construction and arrangement ofthe devices for locking and releasing the regular and the half-hour-striking apparatus.

A representsthe frame of an ordinary or suitable clockwork.

B represents the axle, which receives motion from the main-spring C, or from a weight or other device.

The aalelV carries a large toothed wheel, a`, which meshes into a pinion, '6, on a horizontal axle, D.' On

Vthe axle D is mounted a large toothed whee l'E, which meshes into a pinion, c, von an axle, d, from which, by

similar gearing, e,4 motion is transmitted to an axle, carrying the ily F, as shown.

GrA represents the staifof` the minute-hand, g, and H is the tube carrying the hour-hand, 7L. Motion is imparted to the staff G and tube H, in the 'usual or in a suitable manner.

'Upon the nnerface of the wheel E aresecured thirteen pins, z' z', arranged 'in acircle, concentric toI the axle D, andequally far apart from each other.

Irepresents the striking-b ll,-and J the main hammer, secured to a rod, j, which projects from au oscillatingaxe, 7c, as show'n. An'arm, l, projecting also vfrom the a'xle Ic, fits under one of the pins e', as shown, and thus the connection between the hammer-wheelE .andthe bell established. A spring, m, pressing uponan arm projecting from the axle k, has the'tenden'cy to throw the hammer against the bell unless the same is lifted by one of the pins z', as shown.

L is a cam, mounted on the staG', as shown in Iig. 3, so as to revolve withfthe same. i

'M is a lever, having an arm, u, near one end, the end of said arm being pivoted to .thc-frame A, as shown in fig. 3. A bar, O, is pivoted to the lever M above the shaft G, and rests with'its'end on the edge of the cam L, a spring, r, drawing it into proper position. y

The extreme en d of' tho-lever M is bent, as shown in iig. 2, so as to catch a rod'or stop, p, projecting from the ily-shaft f, as shown. Thus the lever M, hud the stop or slops'p, formthe detents for preventing the striking-apparatus from I noving. l I

In the edge of the cam is formed a sudden depression, s, which is 'at all times inline witli'the minute-hand y, and which, whenthe minute-hand points at 1 2, causes the 'bar o tofall -upon the lower part o f `the edge,

.thereby lowering the end of the lever M and releasing tlie stops p, allowing the ily to revolve, and thus setting the whole striking-apparatus in motion. e

To the arm n, which projects from th'e lever M, is pivoted the end of the lever N. ,(Ths lever has a-pin, t, which rests upon the edge of a heart-shaped cam O, mounted on .the tube H, as shown.

A spring, o, may be used to force the leverN down upon the cam O if its own weight is not suilicient for the purpose. To the'front face of the `wheel 'E are Aliked seven pins, itl, u2, us, u, ui', u, and ul, respectively. These pins are arranged in a spiral line around the axis of the wheel E,-as is indicated in fig.- 1, so that vthey are all different, far from the axle D." l

The end of the leverN,l when the movement is at rest, lies with its free .end against one of the pins u, and

when the apparatus is set in motion, itis raised -or loweredby the heartshaped cam `Q, so as to stand opposite to the pin by-which the motion i's to he arrested.

In the s'mallangle described'betwe'e'the pins u and uis one p in z', andin its supplement arctwelve pins,

i'. Thus, when the end of'thele-veriN-arrests the whcelE by meansof thc-pin fu, as in fig: '1,'and tho vwheel is then again set in motion, it willbeagainarres'ted by means ot t l1e .pin nl, and as the wheel turns in the dircction of the arrow 1-in lig. 1, the short distancebetw'een LL andi-u1 will be traversed by the pin, when 'ul will strikethe end of N, and 'as but one-pin., z', is in'this'space, the;hammer will be raised but once by a lpin, z', and

consequently the hour-hand 'stands at 1. When the lever-"NI rests'upon thedepressio-n inthe heart-shaped cam O, its end will be in its lowest position, and will strike. against thefinnermo'st Apin u`when' the hour-hand stands at 6; thence the lever N will be gradually raised, and willdetain thewheel by means of the pins a5,

u, as, u2, u1, and respectively, `asthe arm o drops into the depression of thecanl L once during every revo-v lution of the staff G. Y s

When the bar is being raised, and arrives atthe pin us, thcfwheel -E will have moved in an are in'which seven pins, z, are arranged,land thus it will strike'? when at u, vthe strokes the-hammer will be 8; when at a3, 9; at u2, 10; ,at u1,1 1; and at u, 12. I. i

When at 12,"the lever N is on the most elevated part of the heart, and as thetube Hcontinnes to revolve,

it is being gradually lowered,so as to come again to the pinatl, when'it will strike 1, and as it continues to hel lowered, it will arrive at `the pin u", when it will strike 2; at us, 3; at u134, at'uf 5;-"and at u, 6.

It will be seen that, therefore, 'each pin, except uand M6, gives a different amount of strokes when the lever lN is-being raised, or. when itis being lowered, This is easily explained andfundcrstood. When, forexarnple,=

th'e lever is lowered from the-pin u, it comes against u1,^and itstrikes 1, as above described when the lever-.is raised from the pin u arrives alsoat u, but to do .this the wheel E must .turn 'in -a curve, in which eleven p ius, z', are arranged, and thus it will'strikell.

As soon as the H`y`F is released,` the clock beginsito strike, andzthe'striking-apparatus-is stopped when one of the'seven pins u strikes against thre e'nd of the lever N. But as soon as the-shaft G continues to turn, the arm o is-soon raised on .the cam'L sufficient to allow the lever M to catch the. stop As the lever N is pivoted to the arm n ofthe lever `M, it is evident that, 'as the lever M is being raised, the lever N will be slightly drawn'back,and will therefore be released from the pin u, against which its end was held, so that it can be -freely raisedor lowered again by the heart O. It will thus beseen that the-lever Ndetains the motion momicntarily, but that the lever M- soontakes its place as detent-lever, and that therefore the lever N is free to move after having fulfilled its oice by stopping one of the pins All these results could not be obtained it the levers M, N, and oV were not jointed together, as shown, so that eachwill be affected by the n iotion of the other.

The lever N is represented as; working above the axle D. It may lalso work below thesame, in which case it will have to 5be providedfwith a hook atits'end, to detain the pins u, as indieatevhby blue' lines in fig.' 1. In that case, the connections between the levers M, N, 'ando maybe slightly varied, but will remain the same in fact. The arnl ofmay, for example, be made oscillating, so as not to beraised, but moved aside by thc'eam L. In that case, also, will the lever M -be iirmly secured to the lpivoting-.pin of the -lever o, while the' lever N is pivote-d to an arm projecting from the pivoting-pin. v I

I am aware that attempts haveY been iliade at the introduction o f spirally-arranged pins on the h amnierwheel E, but in all such cases no truc spiral line was used, as a new start had to b'e taken from 12 to l, the same set of pinsbeing not used to.. strike the lever N as itiwas moved upward vand downward; some pins may have been used twice, but not all, .between the six and twelve pins, as in my clock.

The apparatus may also be'conn'ected with'a half-hour-striking device. The same consists of a hammer, P, secured to a rod, w, which turns with vits pivot-pin x. Fro n 1 the pin a: extends up\va'rd 'an. :\rm or rod, y, which catches over thehooklshaped end of'a bar, z, that is pivoted tothe upper part of the frame A, as shown. A spring, a', tends to depress the bar z, so that it rests upon the lower edge of a'slot or recess in the frame', :is shown. It will be noticed that when the lever M is raised out ofthe recess s 4o'f thecam L,'it will bejustunder the lower edge of the bar z, as shown by red lines in iig. 3.' Oppositel to the recess s is, on the ca ln- L, an ele vatedportion, b', which is vertically above the axle GrI when the minute-hand points at 6.

By this elevated portion thea'r'm o is raised higher than usuaIL'a-nd 'thereby also=the .lever M is 4raised,

spring, c', be forced against the bell, indicating that thcminute-handpoints at 6'.

elevating the bar'z, so that the -same will release the arm t1/,'thus releasing the hammer P, which will, hy a The rod@ is bent,` so as 'to have @horizontal portion,- as shown in iig. 2. This horizontal portion is under the arml of thei'han'lmer- J', an d 'Y'Yhen the hammer P has struck-the 'horizontal part of y will rest against the armzl.

As soon las'th'e minute-hand points at 12, the striking-apparatus 'will be s et in motion,. and as thepin z' cur- -rics'the a1- in l' back to raise'the.ha mmei J,'the arm Zivill carrythe rod 'y' back far enough to o ,llow its end fo catchnuder'the end of the spring-catch z.

Thus the half-hour-striking vutta'chmf'-e`nt is set, or, it may be said, wound up, by tlie .xnotionof the main striking-hummer J. 1t may also as wellbe set by the direct actionv o'f the wheel E, or by another portion of the mein'striking-o'pparatu's,with vthe same eiec't. When the hands are trn'ed backwnrd, the shoulder s, onthe catndl, Qnrri'es the arm' o toene side', z zn'd the-spring? draws the l'atter into its proper position after itsend isA -released'from the 'shoulder s; 'Thusthehonds maybe-turned bckirardyithout injuryto thevinternul arrange- 'ment orparts.'

' j'Thismo'vement could not beeccomplished if- 'the lei/erl M could not-move up and down. To iucilitute this backward motion' of th'ehan'ds,-the' cum L shoulder may be provided with a. attened portion, near the recess a, esshowm 'to allow ,the end of 'the'bar o' tn b'e drown 'buck bythe spring By such backward motion of the arm o, the leyerM isreisedto'lock 'thelyn -Haying'thus described my invention, inhnt I claim :is-now, end d'csire to secure by Letters Puten t, is-v 1. Thenr'rangementof theserendetenft-pinsfu, Qld, u, die., on tho facegof the' hammer-wheel E, the said .pins beingsetfin lah'pir'ljline, us'described,rind at suchdi's'tuces apartjthat -the vrequiredrmlmbervof pins e' e' will be betw'een"'euery'.trvo adjacent pins 11-substnntinl`ly'-us :ind fortheprpose. herein shown 'und `described.

2.-1lh'eheart-shaped 'cam- 0, ivjheniniounted on`or co'nnected' by gear or otherw-is e"'with the -tnbe H, to

which `the hour-handlis fastened, andv`vh,'en",coxnbined .within lever, which is'fgrhdusliy raised or lowered 'by pose vhereinsh'ow'n 'and described.4 Y

3.'.The leverN, 'when arrnged-sbstentinlly os4 herein shown'nd-described,'in combination `with th'e heartshaped cani Q, tnrnin'gjfith'the Itube the-seyen pins u,'u,' dtc.,.o.rrongedrspirally on the 'ncc of tho -w'heel'E, which corrie's the thirteenipins'fv 'sifbstontially u s herein shoirnn-d described.V

4. The 1'everM, when connecte'dwitb th'e'b'ar o, n'd when raised and. lowered.' by vmezins of -the cs'nr L, in combination 'with thestops'p on-.the gllrnudehnd operating s nb'stuntiully` usherein shown and described. 5.Conneating' thedtentLIeYenN with therctainng-leverM; 'and with the-releasing-lcver o, substantially ssun'd for 'the-purpose .set forth.'

x6. The arrangement and combin'aionwth eoch' other of thehun-shaped' cam O, lever N, wheel'E, having the seven pins u, u1, Ste., cam L ,ieirers o end M, `and stops p on y'Frall .made und operating' su-bstnntiullysns herein shown and described.

Q7. -'The h'alf-hour-striking gpparatug'when'consisting' of the hammer P, rods zo and y, the latter. beingheld b'ymeans of neming-catch, z, subs'tontially as herein shown and described.

V8.' Connecting the' lever M'nth the cotehz of the h elf-'hour-striking apparatus, so as to release the sume, aubstenti'ally es herein shown anddescribed.. 9, The 'arrangement herein' shown v and described, of setting the half-hour-striking apparatus, by means of tbe erin l of the moin han1mer,'which catche's'tlfe'r'od of the half-hour hummer, locking it with itsentch z,

when the mainnstrikingldevice vis in operation.

.10'. com' L, `when mountedoutils sta G, as herein shown und described, and when provided with a. recess', 8,' and with arr elevation, b', opposite to the some, substantially as and for the purpose herein specilied. 1i. Pivoting the'erm' o to the l'ev'er'M, and combining it with the spring r, for 'the purpose oi' allowing the hnnds to be'tur'nedbnckward, substantially as herein show'nand described.v

' 12.' Setting the ha1f-hourstriking nppardtns by means of the main stri king zipporutus, when the some is in motion, snbstantilly as set forth.

N. E;.MULF0RD. Witnesses:

WM.v F.' McNAMsRA, ALEX. F. ROBERTS. 

